package com.atguigu.gateway.filter;

import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

import java.net.URI;

/**
 * @Author: change
 * @Date: 2025/04/14 19:30
 */
@Slf4j
@Component
public class RtGlobalFilter implements GlobalFilter, Ordered {
	@Override
	public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
		ServerHttpRequest request = exchange.getRequest();
		ServerHttpResponse response = exchange.getResponse();
		URI uri = request.getURI();
		long startTime = System.currentTimeMillis();
		log.info("请求开始了 uri: [{}]，开始时间：{}", uri,startTime);
		//==================以上是前置逻辑==========================
		Mono<Void> mono = chain.filter(exchange).doFinally(signal -> {
			//==================以下是后置逻辑==========================
			long endTime = System.currentTimeMillis();
			log.info("请求结束了[{}],耗时{}ms", uri, endTime - startTime);
		});
		return mono;
	}
	
	@Override
	public int getOrder() {
		return -1;
	}
}
